diff --git a/.travis.yml b/.travis.yml
index 70015c7..c4f7301 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ matrix:
 before_script:
  - phpenv rehash
  - git clone git://github.com/silverstripe-labs/silverstripe-travis-support.git ~/travis-support
- - php ~/travis-support/travis_setup.php --source `pwd` --target ~/builds/ss
+ - php ~/travis-support/travis_setup.php --source `pwd` --target ~/builds/ss --require phpunit/php-file-iterator:1.3.4
  - cd ~/builds/ss
 
 script: